What kind of terrain is allowed for Mirage Arcane?

The spell mirage arcane is problematic in that much is left undefined, or unclear. It is a 7th level spell, so its powers are unexpectedly great. Nonetheless, there must be some limitations to the spell. I’m specifically interested in the type of terrain that the local one can be changed to.

Jeremy Crawford once unofficially tweeted that targets could drown in an imaginary lake, or fall off an imaginary cliff, so we can assume that spawning a lake in the middle of nowhere isn’t too far-fetched.

The mirage arcane spell gives you tremendous latitude in how you make the affected terrain look and feel. The altered terrain can even hurt someone. You could drown in the spell’s illusory lake, for example, or fall off an illusory cliff.

1. Can extraplanar terrain be used? Places like the Elemental Plane of Fire are inherently dangerous to humans. Could you use Mirage Arcane to summon typical terrain from that plane, like a sea of fire (for example)?

2. Do acid lakes, toxic bogs, and active volcano calderas count as terrain? I’m inclined to say that if one can drown in an illusory lake, then surely one can melt in an illusory acid lake. The toxic bog though, it’s more debatable if its terrain components are the deadly ones. And I’m not sure if a big lake of lava is terrain.

3. Does the allowed terrain depend on location? Perhaps summoning a lake of lava in the middle of a calm meadow is a bit extreme (then again, perhaps not for a 7th level spell). However, surely if one were to use this spell in a volcanic landscape, then it would be appropriate?

Do objects/magical effects have to interact with Mirage Arcane?

The Mirage Arcane spell says:

Creatures with truesight can see through the illusion to the terrain’s true form; however, all other elements of the illusion remain, so while the creature is aware of the illusion’s presence, the creature can still physically interact with the illusion.

This similar question discusses the interaction between a character and the illusion as being optional if the character has Truesight. Does this optional interaction apply to the following:

  • Objects attempting to pass through the illusion (i.e. a character wanting to shoot a ranged weapon through the illusion)?
  • Magical effects attempting to pass through the illusion (i.e. does a caster have a Clear Path to the Target for a spell effect)?
  • Does the ability to perceive through the illusion apply only to creatures with Truesight or can characters with a blindsight type ability like a Rogue’s Blindsense allow the character to ignore the illusion within their range?

Does Mirage Arcane spell allow everyone to see everything and let the (real) sunshine in?

The spell Mirage Arcane allows for a cubic mile of terrain modification. Can this be used so one can see everything?

Excerpts of Interest

The Illusion includes audible, visual, tactile, and olfactory elements, so it can turn clear ground into Difficult Terrain (or vice versa) or otherwise impede Movement through the area.

Also of note:

The spell doesn’t disguise, conceal, or add creatures.

So i am asking if these two passages suggest one can make a cubic mile totally transparent / translucent with this spell.

Sample scenario:

A group of vampires sleep a half mile (safely) below the surface around noon on a clear, cloudless day. Some bloke casts Mirage Arcane on the ground area and transforms the entire region as transparent as fibre optics. Ten minutes later Mr. von Zarovich & his vampiric friends are all turned completely to ash.

Whilst not slaughtering innocent undead blood suckers, this might be a great spell for looking into any fortress, dungeon or whatever you like. Even better than Scotty’s transparent aluminum, perhaps?

Long Story Short: Wizard tries to cast Mirage Arcane spell so as to render a cubic mile of solid rock utterly transparent & see through for about ten days or so.

How does ‘Mirage Arcane’ interact with damage types, speed, and Concentration?

Reading over different questions about ‘Mirage Arcane’, I’ve come to what I believe is a fair understanding of what the spell can do, but I’m left with a few questions. So far, my understanding of the spell is this:

  1. The spell can create formations that can be interacted with as if they are real (See: https://twitter.com/JeremyECrawford/status/709549372875218944)

  2. The spell cannot create deformations that can be interacted with as if they are real (See: Can I get creatures stuck in the ground with Mirage Arcane + Illusory Reality?)

  3. Under the right circumstances, illusions created by ‘Mirage Arcane’ can cause harm (See: https://www.sageadvice.eu/2018/06/03/if-i-used-mirage-arcane-to-transform-a-lake-of-water-into-a-lake-of-lava/)

Now, to quote the spell:

The illusion includes audible, visual, tactile, and olfactory elements, so it can turn clear ground into difficult terrain (or vice versa) or otherwise impede movement through the area.

I am assuming that this means that with regards to speed, ‘Mirage Arcane’ would be able to create normal terrain from difficult terrain and vice versa such that the original terrain is not accounted for with regards to speed, only the illusory terrain. Is there any RAW or RAI that conflicts with that interpretation?

But more to the point: What damage type is damage caused by interacting with the terrain, if damage is caused by some means?

For example: I have before me an empty, flat field. I create an illusory hill that rises up 100 feet and ends in a cliff. I push my friend off the cliff. Given we are actually 100 feet in the air, supported by the illusion, he should take bludgeoning damage from the fall as per normal, correct?

Now lets suppose I have the same field, but this time I create an illusory cliff at the same level as the field that drops 100 feet down. I push my friend again. In reality I just pushed him from one spot in the field to another a few feet over, but for him he “fell”, so does he take damage? If so, should the damage type be bludgeoning or psychic, similar to ‘Phantasmal Force’?

Similarly: If I burn my friend with illusory lava in that same field, does he take damage? If so, fire or psychic? If it does not cause damage, but instead causes phantom, illusory pain as if one were taking damage, would this call for a concentration check against casters concentrating on a spell?

I don’t want to shunt the power of a 7th level spell, but being able to move as if a valley/mountain wasn’t present (within the spells bounds of course) or potentially devastate an entire army with illusory lava/water seems a bit much for illusion magic, even 7th level.

Can a creature with Truesight ignore the tactile elements of Mirage Arcane?

Mirage arcane is a powerful illusion spell that:

includes audible, visual, tactile, and olfactory elements

However, the spell description adds:

Creatures with truesight can see through the illusion to the terrain’s true form; however, all other elements of the illusion remain, so while the creature is aware of the illusion’s presence, the creature can still physically interact with the illusion.

A creature without truesight cannot move through a wall created by Mirage Arcane without destroying the wall. Can a creature with truesight do so?

It seems like the answer hinges on exactly what work the last “can” in the above quote is doing.

How do I disable the virtual gamepad in Dolphin Emulator when running on Lenovo Mirage Solo?

I have a Lenovo Mirage Solo VR headset and I want to play gamecube games on it. I installed the Dolphin emulator and everything seems to work perfectly. Except for one thing… I can’t find a way to disable the virtual gamepad that is displayed in front of the screen. A regular android device just needs to be swiped down from the top and then click the configure button from the available options to turn off the virtual gamepad. This method isn’t working for the Mirage Solo.

I tested on my phone turning the virtual gamepad on and off and then checking the files to see if there is any differences, but after comparing only two files are changed after running the game and changing the settings. After copying the two files with the settings for the virtual gamepad turned off and overwriting the files with the settings turned on nothing happens. My guess is that these two file in the dolphin.emu folder were just changed after I ran the game again and don’t have anything to do with the virtual gamepad. Besides that whether I have the settings for the virtual gamepad turned on or off on my phone it’ll be persistent between closing and opening the app. So it seems to me that there must be some file that is being changed but I have no clue where it could be. It isn’t in the android folder.

I have also tried a few other things such as on the android phone when you open a game and then press the button to view the recent apps and then return to dolphin emulator it will show the swipe down settings. Unfortunately that doesn’t work with the Mirage Solo either (at least the way I tried it didn’t work). The last thing I tried was installing a button remapper, a sidebar app to quickly switch apps, and an app that opens the swipe down bar. Once again the Mirage Solo surprised me with it’s inability to do what I desired. The sidebar apps and the button remapper apps (and possibly the swipe down bar app) don’t work properly on the Lenovo Mirage Solo (it seems that the accessibility settings is different for the Mirage Solo).

I would really like to get rid of the virtual gamepad and have this working because the experience of playing games with virtual buttons covering the screen is terrible for me, but I’m out of ideas. Any help is appreciated.